Journal of Engineering and Sustainable Development最新文献_第8页

EVALUATION OF TIME OVERRUNS AND TIME MANAGEMENT TECHNIQUES IN ROAD CONSTRUCTION PROJECTS IN ERBIL CITY 额尔比勒市公路建设项目工期评估及工期管理技术

Journal of Engineering and Sustainable Development Pub Date : 2023-07-01 DOI: 10.31272/jeasd.27.4.7

Aksana Jihad Mohammed

{"title":"EVALUATION OF TIME OVERRUNS AND TIME MANAGEMENT TECHNIQUES IN ROAD CONSTRUCTION PROJECTS IN ERBIL CITY","authors":"Aksana Jihad Mohammed","doi":"10.31272/jeasd.27.4.7","DOIUrl":"https://doi.org/10.31272/jeasd.27.4.7","url":null,"abstract":"Successful people utilize their time judiciously. The challenge of completing construction projects within the estimated time frame is the biggest concern among practitioners. In this research two aspects have been highlighted, first; the most significant factor of time overrun in construction projects performed by Erbil Municipality during road construction. The second aspect is the time management methods held by the project team. A random sampling technique was used to administer 126 questionnaires to professionals such as Project managers, Engineers, and contractors working on road construction projects for Erbil municipality. On the other hand, a case study has been conducted for 70 constructed projects during 2018-2022 for the evaluation of time management techniques in road construction projects by identifying the process of monitoring, software packages that are used for that, the progress of work, and investigating how progress records are kept in Erbil City municipality projects. The results revealed that the most significant factor for time overrun was the economic crisis which led to the failure to pay contractors' dues in a timely manner, followed by the unreasonable time frame for the completion of projects. Used techniques and software packages for time management were identified It is revealed that there is no specific method for managing time. Multiple methods are used depending on the situation.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47381471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INVESTIGATION OF THE MECHANICAL PERFORMANCE OF STONE MASTIC ASPHALT MIXTURES MODIFIED BY RECYCLED WASTE POLYMERS 再生聚合物改性沥青玛蹄脂碎石混合料的力学性能研究

Journal of Engineering and Sustainable Development Pub Date : 2023-07-01 DOI: 10.31272/jeasd.27.4.2

S. Tayh, Doua Yousif Khalif Khalif

{"title":"INVESTIGATION OF THE MECHANICAL PERFORMANCE OF STONE MASTIC ASPHALT MIXTURES MODIFIED BY RECYCLED WASTE POLYMERS","authors":"S. Tayh, Doua Yousif Khalif Khalif","doi":"10.31272/jeasd.27.4.2","DOIUrl":"https://doi.org/10.31272/jeasd.27.4.2","url":null,"abstract":"The usage of polymer-modified asphalt binders has increased as a result of the significant increase in the number of conventional cars operating on Iraqi roads in recent years. This has resulted in increased strains being placed on pavement structures and materials. Global exploration has focused on the development of stabilizing Stone Mastic Asphalt mixtures for improved pavement behavior. Numerous effective efforts were made to stabilize stone mastic asphalt mixes with polymers and fibers. Iraq produces a considerable amount of waste polymer materials each year. Usually, they are sent to landfills for disposal. These wastes are dumped, occupying a sizable portion of landfill space and creating various serious environmental issues. The study focuses on how waste polymer additions, such as recycled plastic bottles, shopping boxes, and tire crumb rubber, affect the mechanical performance and durability of stone mastic asphalt mixtures. The mechanical performance attributes were assessed. It is evident from the findings that the drain-down amounts were within the permissible requirement range. The findings also showed that the indirect tensile strength, Marshall Stability, moisture damage resistance, and resistance for permanent deformation of stone mastic asphalt mixtures have all increased as a result of the use of waste polymer components. The recycled polymer-modified mixes are the combinations that are most resistant to rutting, according to the results of the repeated load axial creep tests. Iraq may have new options to employ the significant volumes of recycled polymers that are becoming accessible as a result of recycling waste polymers.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45786435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MICROCAPSULES AND INDUCTION HEATING: TWO METHODS FOR CLOSING CRACKS IN ASPHALT POROUS PAVEMENTS 微胶囊和感应加热:沥青多孔路面修补裂缝的两种方法

Journal of Engineering and Sustainable Development Pub Date : 2023-07-01 DOI: 10.31272/jeasd.27.4.3

Siham Idan Salih, Alvaro Garcia, J. Contreras,

引用次数: 0

STRUCTURAL PERFORMANCE OF COMPOSITE BOX BEAMS WITH CORRODED BOTTOM FLANGE UNDER MONOTONIC AND REPEATED LOADS 底部翼缘腐蚀组合箱梁在单调和重复荷载作用下的结构性能

Journal of Engineering and Sustainable Development Pub Date : 2023-07-01 DOI: 10.31272/jeasd.27.4.10

Ghufran Khudair Abbass, Ali Hameed Aziz

{"title":"STRUCTURAL PERFORMANCE OF COMPOSITE BOX BEAMS WITH CORRODED BOTTOM FLANGE UNDER MONOTONIC AND REPEATED LOADS","authors":"Ghufran Khudair Abbass, Ali Hameed Aziz","doi":"10.31272/jeasd.27.4.10","DOIUrl":"https://doi.org/10.31272/jeasd.27.4.10","url":null,"abstract":"The current research is dedicated to studying the flexural behavior of composite box beams with corroded bottom flanges. Six simply supported beam specimens were manufactured and tested. The composite box beams were fabricated with steel box beams of 1100mm, 100mm, and 100mm for length, width, and height, respectively, while the concrete deck slabs were made with dimensions of 1100mm, 400mm, and 50mm for length, width, and thickness, respectively. The composite sections were formed by connecting the RC deck slabs with the steel box beams by using a headed shear connector. Three main variables were considered; the load type (monotonic or repeated), bottom flange thickness (with or without corrosion), and whether to consider or ignore the strengthening by CFRP strip. Experimental results indicated that the ultimate loads were decreased by 29-33% for the corroded bottom flange beam specimens; while the ultimate loads for the strengthened beam specimens were increased by 60-67% as compared with the un-strengthened corroded corresponding beam specimens. Also, the change of the applied loads from monotonic to repeated leads to a reduction of the ultimate load by 17-22%.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69348986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RECURSIVE TERNARY-BASED ALGORITHM FOR COMPUTING PRIME IMPLICANTS OF MULTI-OUTPUT BOOLEAN FUNCTIONS 计算多输出布尔函数素数蕴涵的递归三进制算法

Journal of Engineering and Sustainable Development Pub Date : 2023-05-01 DOI: 10.31272/jeasd.27.3.2

Zaid Al-Wardi, Osama Al-Wardi

引用次数: 0

RAYLEIGH FADING CHANNEL ESTIMATION BASED ON GENERALIZED REGRESSION NEURAL NETWORK 基于广义回归神经网络的瑞利衰落信道估计

Journal of Engineering and Sustainable Development Pub Date : 2023-05-01 DOI: 10.31272/jeasd.27.3.6

Emad Ahmed Hussien, Ghanim Abdulkareem

{"title":"RAYLEIGH FADING CHANNEL ESTIMATION BASED ON GENERALIZED REGRESSION NEURAL NETWORK","authors":"Emad Ahmed Hussien, Ghanim Abdulkareem","doi":"10.31272/jeasd.27.3.6","DOIUrl":"https://doi.org/10.31272/jeasd.27.3.6","url":null,"abstract":"With the rapid development of wireless communication, 5G is gradually growing into a large-scale basic Internet that supports various industries in the whole society. The substantial expansion of its service scope poses many challenges for the underlying technology, especially for the crucial component of the physical Layer-Orthogonal Frequency Division Multiplexing (OFDM). Recently, Neural Networks (NNs) have attracted extensive attention due to their excellent performance in computing vision and natural language processing. Its strong universality also provides new development space for traditional communications. This manuscript conducts an in-depth study on channel estimation for OFDM systems and explores the possible application of a Generalized Regression Neural Network (GRNN) to estimate the Channel Impulse Response (CIR) attenuated by AWGN and Rayleigh fading system. Moreover, three traditional channel estimation algorithms, i.e., LS, MMSE, and LMMSE, are derived by mathematics. In addition, this thesis illustrates several typical neural networks in detail, including their internal structure, parameter updating process, and related optimization algorithms.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43727568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PERMANENT MAGNET SYNCHRONOUS MOTOR TORQUE RIPPLE REDUCTION USING PREDICTIVE TORQUE CONTROL 基于预测转矩控制的永磁同步电机转矩脉动抑制

Journal of Engineering and Sustainable Development Pub Date : 2023-05-01 DOI: 10.31272/jeasd.27.3.9

Saif T. Bahar, Riyadh Ghanem Omar

引用次数: 0

A REVIEW ON SOIL CONTAMINATION SOURCES: IMPACT ON ENGINEERING PROPERTIES AND REMEDIATION TECHNIQUES 土壤污染源:对工程性质的影响及修复技术综述

Journal of Engineering and Sustainable Development Pub Date : 2023-05-01 DOI: 10.31272/jeasd.27.3.1

S. AL-khyat, D. Naji, Huda T. Hamad, Helen Onyeaka

{"title":"A REVIEW ON SOIL CONTAMINATION SOURCES: IMPACT ON ENGINEERING PROPERTIES AND REMEDIATION TECHNIQUES","authors":"S. AL-khyat, D. Naji, Huda T. Hamad, Helen Onyeaka","doi":"10.31272/jeasd.27.3.1","DOIUrl":"https://doi.org/10.31272/jeasd.27.3.1","url":null,"abstract":"Soil contamination produced by improper management of various petroleum and industrial products causes potential risks to the environment and soil engineering properties. Such contamination causes environmental deterioration and adversely affects soil engineering performance, altering almost all geotechnical properties. Several remediation techniques have been proposed to decontaminate the polluted soils. Choosing the best technique depends on both the energy consumption during operation and the treatment efficiency. The lack of a universally appropriate treatment method and the unavoidable expansion of contaminated land have justified the sake of reviewing the behavior of contaminated soils to develop both environmentally and geotechnically suitable soils for construction projects. The present paper reviewed some soil contamination sources’ backgrounds, effects, and remediation methods. Soils influenced by petroleum hydrocarbons and industrial effluents were evaluated. According to the reviewed studies, contaminants are evidenced to have a negative impact on soils' geotechnical characteristics by increasing settlement and swelling, reducing shear strength, and decreasing permeability. The need to restore the engineering characteristics of soils suggest the necessity to use remediation or stabilization technique. The electrochemical method, bioremediation, and stabilizing by additives are revealed to be efficient in improving the engineering properties and performance of contaminated soils.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47266918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A REVIEW STUDY OF THE USE OF CALCIUM CHLORIDE IN CONCRETE 氯化钙在混凝土中的应用综述

Journal of Engineering and Sustainable Development Pub Date : 2023-05-01 DOI: 10.31272/jeasd.27.3.4

Haitham Saeed

引用次数: 0

INVESTIGATION OF FRICTION PRESSURE EFFECT ON WELDING QUALITY IN FRICTION STUD WELDING PROCESS 摩擦螺柱焊过程中摩擦压力对焊接质量影响的研究

Journal of Engineering and Sustainable Development Pub Date : 2023-05-01 DOI: 10.31272/jeasd.27.3.8

Mustafa Saad Kadhim, K. K. Resan

{"title":"INVESTIGATION OF FRICTION PRESSURE EFFECT ON WELDING QUALITY IN FRICTION STUD WELDING PROCESS","authors":"Mustafa Saad Kadhim, K. K. Resan","doi":"10.31272/jeasd.27.3.8","DOIUrl":"https://doi.org/10.31272/jeasd.27.3.8","url":null,"abstract":"The influence of friction pressure on welding quality when friction stud welding 1017 low carbon steel with AISI 304 austenitic stainless steel is investigated in this study. friction stud welding is employed in industrial applications instead of conventional welding processes Due to the friction welding process didn't need to reach the melting point of welded metals. Welding is performed on these dissimilar metals by utilizing a lathe machine with a load cell connected to a weight indicator and a manufacturing grip to fasten the plate at a rotating speed of 1600 RPM, a friction time of 20 seconds, and a friction pressure of (15, 20, and 25) MPa. After the welding procedure is completed, the specimens are subjected to tensile, torque, and hardness tests to evaluate the welding quality. In addition, optical microscope research was carried out to determine the microstructural aspects. The effect of friction pressure on welding quality was investigated based on the information generated from the results. The increase of friction pressure during the process from 15 MPa to 25 MPa leads to an increasing ultimate tensile strength from 203 MPa to 210 MPa approximately. Also, the torque values raised from 179 N.m to 198 N.m in the same case.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46553888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0